test: simplify test file mocking patterns (#8320)

Simplifies test mocking patterns across multiple test files.

- Removes redundant `vi.hoisted()` calls
- Cleans up mock implementations
- Removes unused imports and variables

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8320-test-simplify-test-file-mocking-patterns-2f46d73d36508150981bd8ecb99a6a11)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Amp <amp@ampcode.com>
Co-authored-by: GitHub Action <action@github.com>

src/components/graph/selectionToolbox/ExecuteButton.test.ts

@@ -7,6 +7,7 @@ import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { createI18n } from 'vue-i18n'
 
 import ExecuteButton from '@/components/graph/selectionToolbox/ExecuteButton.vue'
+import { useSelectionState } from '@/composables/graph/useSelectionState'
 import type { LGraphCanvas, LGraphNode } from '@/lib/litegraph/src/litegraph'
 import { useCanvasStore } from '@/renderer/core/canvas/canvasStore'
 import { useCommandStore } from '@/stores/commandStore'
@@ -47,7 +48,7 @@ describe('ExecuteButton', () => {
     }
   })
 
-  beforeEach(async () => {
+  beforeEach(() => {
     // Set up Pinia with testing utilities
     setActivePinia(
       createTestingPinia({
@@ -71,10 +72,7 @@ describe('ExecuteButton', () => {
     vi.spyOn(commandStore, 'execute').mockResolvedValue()
 
     // Update the useSelectionState mock
-    const { useSelectionState } = vi.mocked(
-      await import('@/composables/graph/useSelectionState')
-    )
-    useSelectionState.mockReturnValue({
+    vi.mocked(useSelectionState).mockReturnValue({
       selectedNodes: {
         value: mockSelectedNodes
       }